/*
 * Copyright 2017 - 2025 the original author or authors.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see [https://www.gnu.org/licenses/]
 */

package infra.bytecode;

import org.jspecify.annotations.Nullable;

/**
 * @author TODAY 2021/7/28 22:43
 */
public abstract class AnnotationValueHolder {

  @Nullable
  protected Object value;

  /**
   * get annotation-value
   */
  public Object read() {
    Object value = this.value;
    if (value == null) {
      value = getInternal();
      this.value = value;
    }
    return value;
  }

  protected abstract Object getInternal();

  public abstract void write(ByteVector annotation, SymbolTable symbolTable);

}
